COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Kawasaki BK 117 Series Helicopters AD/BK 117/5 Electrical Bonding and Static Dischargers 2/94 Applicability: Kawasaki Heavy Industries BK 117 series helicopters serial numbers 1001 through 1066 inclusive, except 1007 and 1036. Requirement: Action in accordance with Kawasaki Heavy Industries Service Bulletin KSB-117-077 dated 1 February 1991. Note: JCAB AD TCB-3432-91 refers. Compliance: If not previously accomplished, then prior to 3 August 1994. Background: The JCAB has received reports of electrostatic discharge igniting fires at fuel vent line outlet ports. Compliance with this directive will decrease the likelihood of electrostatic discharge causing a fire hazard.